Multiple photoionisation of the rare gases in the XUV region

Shake-off on inner-shell resonances of Ar, Kr and Xe

“…However, as has been discussed above, autoionization into main-line channels is weak (Southworth et al 1983, Hayaishi et al 1984, Becker et al 1986~ Lindle et al 1986.…”

“…+ PCI also causes the Ar yield to decrease slowly above the 2P1/2 threshold as the probability for capture of the photoelectron decreases (Hayaishi et al 1984). At the Kr 3d and Xe 4d thresholds, however, Hayaishi et al (1984) -surprisingly found no evidence for PCI in the Kr and Xe ion cross sections.…”

“…Combining synchrotron radiation and mass spectrometry, Hayaishi et al (1984) examined the cross sections a for the formation of singly.…”

“…The Rydberg electron could participate in the resonant decay in some other way, such as being excited (shake-up) or ionized (shake-off). For the most important pathway to doublycharged ions, Hayaishi et al (1984) proposed a two-step process, such as -1 + -1 -1 +2-2 Kr 3d5/25p + Kr 4s 4p 5p ~ Kr 4p ,rather than a shake-off process.…”

“…In comparison. Kr and Xe ion-yield measurements (Hayaishi et al 1984, Eland et al 1986 showed the fractions of single and double ions varying slowly over the resonances, while the triple ion increases with…”